//正例{ before: true, after: true }
const obj = {'foo':'bar' , 'baz':'qur'};
const a = 1 , b = 2;
const arr = [, ];
const arr = [1 , ];
const arr = [ , 2];
const arr = [1 , 2];
const arr = [, , ];
const arr = [1 , , ];
const arr = [ , 2 , ];
const arr = [ , , 3];
const arr = [1 , 2 , ];
const arr = [, 2 , 3];
const arr = [1 , , 3];
const arr = [1 , 2 , 3];
a , b
